PPP, a Democrat-leaning firm, came out with a new poll tonight showing President Barack Obama leading GOP nominee Mitt Romney in Ohio by 4 points, 49-45.

Six percent of the respondents were undecided. Historically, in a race with an incumbent, undecided voters break heavily toward the challenger, and PPP found evidence that this will probably be the case in Ohio:

In other words, only 13 percent of undecided respondents said Obama is doing a good job, whereas 65 percent said he stinks. By comparison, Romney’s favorability rating among undecided resppondents was a relatively even 26/37.

The news that Ohio is still in play was not warmly received by PPP’s liberal readers:

@ppppolls "a mistake to think based on recent polling in Ohio that the race is over," Are you trying to help Romney stay alive ? Idiots.